This article reexamines the case of al-Hallaj through the lens of the criminalization of thought and the complex relationship between Islamic criminal jurisprudence and Sufi mysticism. Rather than interpreting al-Hallaj’s execution solely as a consequence of apostasy or doctrinal deviation, the study argues that it emerged from the convergence of political authority, legal discourse, and religious power within the institutional framework of the Abbasid Caliphate. In this context, the prosecution of al-Hallaj may be understood as a broader attempt to regulate and punish heterodox expressions of belief and thought. Particular attention is devoted to al-Hallaj’s ecstatic utterances (shaṭḥiyyāt), which, as poetic, symbolic, and experiential forms of language arising from states of mystical ecstasy and annihilation (fanāʾ), resist conventional juridical and linguistic interpretation. The study contends that contemporary political and legal authorities neglected the distinctive hermeneutical nature of such expressions and instead subjected them to the normative categories of criminal religious law. Drawing upon historical chronicles, juristic sources, and classical Sufi literature, the article seeks to distinguish between the notions of “religious crime” and “political crime,” demonstrating how legal mechanisms were employed to suppress forms of intellectual and spiritual expression perceived as threatening to established authority. From a comparative perspective, the article examines the tension between early Islamic juridical discourse and modern principles of criminal justice, particularly those concerning freedom of thought, freedom of conscience, and freedom of belief. It argues that the case of al-Hallaj illustrates the limitations of a legal order closely intertwined with political sovereignty when confronted with forms of religious experience that transcend doctrinal and conceptual boundaries. The execution of al-Hallaj is therefore analyzed as an instance in which legal and religious legitimacy were mobilized to reinforce political authority, raising broader questions regarding the relationship between law, power, and spiritual autonomy. By integrating historical, legal, and intellectual analysis, this study contributes to contemporary debates on the boundaries of religious authority, the criminalization of belief, and the protection of intellectual freedom. It ultimately presents al-Hallaj as a significant historical example through which the tensions between orthodoxy, political power, and freedom of thought may be critically reassessed.